Casting device



June 12, 1928. 1,673,415

. LE MAY CASTING DEVICE ed July 30,

2 sheets-sheet 1 &

June 12, 1928. 1,673,415

J. LE MAY CASTING DEVICE Filed July so, 1927 I SheetsSheet 2 .iyz 3 "IVI m i ll Illlllllll In I" Patented June 12, 1928.

JOHN LE MAY, AURORA, ILLINOIS, ASSIGNOR T0 AURORA METAL COMPANY, A

CORPORATION OF ILLINOIS.

onsrme DEVICE.

Application filed Jul so, 1927. Serial No. 269,473.

This invention relates to improvements in casting devices, andmoreespecially to die casting devices in which air is exhausted from thedie so that atmo heric pressure forces the molten metal into he diecavity.

In devices of this kind, it frequently is necessary or desirable to makethe die of several arts. This is sometimes necessary so that t e castingcan be removed from the die without destroying the same. When the die ismade up of several parts ordinarily there are a'irleaks between theparts. Consequently, if the air is exhausted from the die at one point,there is danger of leakage of air into the die at other points withconsequent injury to the casting.

Y The principal feature of my invention is the provision of an airtightcontainer .in which the die is placed. A metal inlet is provided in thecontainer into the die. Air is then exhausted from the container, withthe result-that air escapes from the die into the container throughevery crack and interstic e in the die. It will be seen, therefore,

that all air leakage is from the interior of the die outwardly.Consequently, when the metal rushes into the die ,cavity it becomescompletely filled, there being no air bubbles to spoil the casting.

Another feature of my invention is the making of the die container sothat when the air is exhausted from the inside, the atmospheric pressuresurrounding the same tends to hold the parts of the container together.

. Other features and advantages of my invention will appear more 'fullyas I proceed with my specification.

In that form of device embodying the features of my invention Figure 1is a vertical sectional view, F 1g. 21s a view taken as indicated by theline 2 of Fig. 1, Fig. 3 I

is a view taken as indicated by the line 3 of Fig. l, and Fig. 4 is aview in side elevation of the upper end of the device.

As shown in the drawings, 10 indicates a substantially cylindrical airtight die con- The lower end of themontainer 10 is provided. with anipple 12 having an prifice 13 to permit entry of the molten metal. 14indicates, in general, the die which is here shown as made up of threeparts comprising the inner cylindrical core member 14:, the intermediatering member 14 and the outer'ring member 14. 15

with each other.

suitable pipe connection 23 is noted, however, that the entire die iscon? tained within the die container 10 and that such die container isair tight. It is to be understood that the parts 14*, 14", and 14 of thedie do not form air tight connections Also, the outer member 14 of thedie does not have an air tight fit inside of the container 10. Asubstantially air tight connection, however, is formed between the dieand the upper end of the metal inlet nipple 12. This nipple, as hereshown, extends up into the container and is provided with a shoulder 12.The lower end of the die member 14 is provided with an aperture asindicated by 10 to receive the upper end of the nipple 12 and the lowersurface of the part 14 is adapted to seat on theshoulder 12. Means areprovided for making a substantially air tight joint on this shoulder,such means comprise a rod 16 with a disk 17 on the lower end adapted tobear against the die. The rod 16 is pressed downwardly by means of thespiral spring 18. The cover 11 for the die container carries a tubularcasing 19 in which the rod 16 and the spring 18 are housed.

20, 20. indicate two rods connected by a yoke 21 at their upper ends andprovided with hooks 22, their lower ends adapted to engage the underside of a flange 10 at the upper edge of the die container 10. The

r 1,673,415- uurrao STATES PATENT OFFICE.

upper end of the tubular member 19 is pref- I erably closed by means ofa plug 19 and 9. provided for exhausting air. I

24 indicates a lever pivoted beneath the yoke 21 by means of the pin 25and provided with a cam shoulder 24 adapted to force the plug 19 and thecasing 19 downwardly and pull up on the rods 20 when the lever 24 is inhorizontal position as shown in Fig. 4. When the lever 24 is swungupwardly, to a vertical position the shoulder 24 is removed from theplug 19* and the rod 20 can be dropped to permit the hooks 22- to bereleased from the flange 10" so that the die container can be opened.

The lower surface of the disk 17 is pro vided with radiating slots 17 sothat air escaping from the crack 26 between the mold members 14 and 14is free to escape into the space 27 at the top of the die container.

In the operation of the-device, the lever 24 is operated to pull u onthe hooks 20 and push downwardly on t e tubular casing 19 so that thecover 11 is firmly sealed on the die container 10. The rod 16 operatesto force the die downwardly tight on the shoulder 12 of the metal inletnipple to form an air seal. Air is then exhausted from the pipe 23 andtubular member 19 to exhaust air from the die container. This causes airto escape from the cavity 15 in the die through every crack andinterstice in the die or between the parts thereof. The lower end of thenipple 12 is then inserted in the molten metal whereupon the flowing ofthe metal is sucked up through the orifice 13 into the cavity 15 to fillall parts thereof. It will be seen that when the air is exhausted fromthe interior of the die container atmospheric pressure will assisttohold the die container 10 and its cover 11 tightly together to assist inmaking the same air tight.

While I have shown and described certain embodiments of my invention, itis to be understood that it is capable of many modifications. Changes,therefore, in the construction and arrangement may be made withoutdeparting from the spirit and scope of the invention disclosed in theappended claims, in which it is my intention to claim all novelty in myinvention as broadly as possible in view of the prior art.

7 What I claim is new, and desire to secure by Letters Patent, is:

l. A casting scribed comprising an air tight die container with a metalinlet nipple'havihg a metal inlet orifice, said nipple projecting intothe interior of the die container; 9, die inside of the die containerprovided with a metal inlet adapted to seat on the inner end of themetal inlet nipple in the die container, said die having aircommunication between its cavity and the interior of the die container;and means for exhausting air from the interior of the die container.

2. A casting device of the character described comprising; a diecontainer with a metal inlet orifice; a cover for the die container; adie inside the container having a metal inlet adapted to seat tightlyaround the metal inlet orifice of the die container, said die having aircommunication between its cavity and the interior of the die container;a' clamp for holding the cover on the die container; spring meansoperating in connection with said clamp to press the die down to causeits metal inlet to seat tightly around the metal inlet orifice of thedie container when the clamp is tightened; and means for exhausting airfrom the die container.

In witness whereof, I have hereunto set my hand this 27th day of July,1927.

JOHN LE MAY.

device of the character de--

